Senior Moment Member
Join Date: Jun 2011
Location: West Vancouver B.C.
Thanked 118 Times in 113 Posts
Rep Power: 6
Purchase some appropriate bronze sheet then find an outfit with a waterjet or laser cutter and have them cut rings that will slip over the throat. Pair them with the ports and drill the mounting holes. Alternatively you can cut them with a plasma cutter but that will require more finish work to clean up the edges.
Spend the extra time to polish them as per RichH - it's well worth it and only a little more work.
I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.